CN204239282U - A kind of for the axial force balance of multistage centrifugal pump and the device of sealing - Google Patents
A kind of for the axial force balance of multistage centrifugal pump and the device of sealing Download PDFInfo
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- CN204239282U CN204239282U CN201420651842.9U CN201420651842U CN204239282U CN 204239282 U CN204239282 U CN 204239282U CN 201420651842 U CN201420651842 U CN 201420651842U CN 204239282 U CN204239282 U CN 204239282U
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- main shaft
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Abstract
The utility model discloses and a kind ofly comprise main shaft for the axial force balance of multistage centrifugal pump and the device of sealing, on the middle part outer wall of described main shaft, cover has restrictor sleeve, and on described restrictor sleeve, cover has orifice sleeve; The leading portion outer wall of described main shaft is arranged with several impellers successively, the back segment outer wall of described main shaft is arranged with successively last anti-impeller and some anti-impellers, some described impellers are arranged on described restrictor sleeve the same side, and the anti-impeller in described end and some anti-impellers are arranged on the opposite side of described restrictor sleeve; Described impeller, last anti-impeller and anti-impeller are respectively arranged with stator, last return guide vane and return guide vane.Use the utility model when impeller is identical with anti-impeller quantity, the axial force that impeller produces can be offset; When impeller quantity is odd number, the back blades on the anti-impeller in described end can balancing axial thrust, in addition, described back blades can also to particle in medium and medium by having good barrier effect, reduce the wear intensity of bearing.
Description
Technical field
The utility model relates to machinery industry field, specifically a kind of for the axial force balance of multistage centrifugal pump and the device of sealing.
Background technique
At present in self-balance type horizontal multi-stage centrifugal pump use, because the situation that the off-design point of operating mode runs is more, the phenomenons such as the thrust-bearing bearing axial force easily occurs that temperature is too high, bearing is acted as a travelling agent circle, bearing wear are too fast.For these phenomenons, improving in axial force balance, all adopting the scheme that leans against of impeller, run into impeller number both sides unequal time, be generally to have more that impeller and carry out out the mode of equalizing orifice.Equalizing orifice arranges the axial force of energy balance portion, but the change of adjoint operating mode, the uncertainty of its effect change, and the leakage of equalizing orifice also can't neglect, and has direct impact to the efficiency of water pump.The aperture of equalizing orifice is larger on the other hand, and the particle in medium will directly pass through from equalizing orifice, carries out, in the throttling arrangement of centre, having larger wearing and tearing to it.Open the method for equalizing orifice, increase leakage rate, also increase the quantity that particle carries out into throttling arrangement in addition.
Model utility content
The purpose of this utility model is the defect overcoming above-mentioned prior art, provides a kind of multistage centrifugal pump balance good, the device of nonabradable balance and sealing.
The technical solution of the utility model is achieved in that and a kind ofly comprises main shaft for the axial force balance of multistage centrifugal pump and the device of sealing, and on the middle part outer wall of described main shaft, cover has restrictor sleeve, and on described restrictor sleeve, cover has orifice sleeve; The leading portion outer wall of described main shaft is arranged with several impellers successively, the back segment outer wall of described main shaft is arranged with successively last anti-impeller and some anti-impellers, some described impellers are arranged on described restrictor sleeve once, and the anti-impeller in described end and some anti-impellers are in the same side of described restrictor sleeve; Described impeller, last anti-impeller and anti-impeller are respectively arranged with stator, last return guide vane and return guide vane, the anti-impeller in described end is provided with back blades.
Further, described last return guide vane is arranged on the termination of restrictor sleeve.
Particularly, the number of described back blades is 4.
Further, space is formed between described last return guide vane and described back blades.
The utility model main shaft is arranged with restrictor sleeve, orifice sleeve, impeller, last anti-impeller and anti-impeller, described impeller, on last anti-impeller and anti-impeller, correspondence is provided with stator, last return guide vane and return guide vane respectively, and the anti-impeller in described end is provided with back blades.When impeller is identical with anti-impeller quantity, roughly can the axial force that produces of basic neutralisation impeller, when impeller quantity is odd number, back blades on the anti-impeller in described end can balancing axial thrust, in addition, described back blades except reaching except the function of equilibrant, can also to particle in medium and medium by having good barrier effect, reduce the wear intensity of bearing.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram (sectional view) of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, concrete case study on implementation of the present utility model is illustrated:
As shown in Figure 1, a kind ofly comprise main shaft 18 for the axial force balance of multistage centrifugal pump and the device of sealing, on the middle part outer wall of described main shaft 18, cover has restrictor sleeve 15, and on described restrictor sleeve 15, cover has orifice sleeve 16; (impeller had both referred to be equipped with the wheel disc of movable vane the leading portion outer wall of described main shaft 18 to be arranged with successively several impellers, finger wheel dish and the general name of rotor blade be installed on it again), the number of impeller described in the present embodiment is three, be respectively the first impeller 1, second impeller 3 and trilobed wheel 5;
The back segment outer wall of described main shaft 16 is arranged with successively last anti-impeller 7 and some anti-impellers, the number of anti-impeller described in the present embodiment three, be respectively the first anti-impeller 11 of anti-impeller 9, second and the 3rd anti-impeller 13, some described impellers are arranged on described restrictor sleeve 15 the same side, and the anti-impeller in described end 7 and some anti-impellers are at the opposite side of described restrictor sleeve 15;
At described impeller, the anti-impeller in end and anti-impeller are respectively arranged with stator, and (stator is that turning of centrifugal pump can device, its effect is that impeller is thrown away the liquid collection come, the flow velocity of liquid is reduced, after partial velocity energy head is changed into pressure energy head, introduce next stage more equably or discharge through diffusing tube), end return guide vane and return guide vane, particularly, described first impeller 1, second impeller 3, trilobed wheel 5, the anti-impeller 7 in end, first anti-impeller 9, second anti-impeller 11 and the 3rd anti-impeller 13 are provided with the first stator 2 accordingly, second stator 4, 3rd stator 6, end return guide vane 8, first return guide vane 10, second return guide vane 12 and the 3rd return guide vane 14.Wherein, described last return guide vane 7 is arranged on the termination of restrictor sleeve 15.The anti-impeller 7 in described end is provided with back blades 17, between described back blades 17 and last return guide vane 7, forms space.Back blades 17 on the anti-impeller in described end 7 can balancing axial thrust simultaneously can also to particle in medium and medium by having good barrier effect, reduce the wear intensity of bearing.
The utility model main shaft is arranged with restrictor sleeve, orifice sleeve, impeller, last anti-impeller and anti-impeller, described impeller, on last anti-impeller and anti-impeller, correspondence is provided with stator, last return guide vane and return guide vane respectively, and the anti-impeller in described end is provided with back blades.When impeller is identical with anti-impeller quantity, roughly can the axial force that produces of basic neutralisation impeller (said axial force is inertial force, object then can produce a centripetal acceleration when rotating owing to there is angular velocity, an instantaneous axis is all there is in general object when rotating, this object can be regarded as and rotate in fixed axis around instantaneous axis, thus centripetal acceleration points to instantaneous axis.And the direction of inertial force is just in time contrary with centripetal acceleration direction, said axial force that Here it is), when impeller quantity is odd number, back blades on the anti-impeller in described end can balancing axial thrust, in addition, described back blades except reaching except the function of equilibrant, can also to particle in medium and medium by having good barrier effect, reduce the wear intensity of bearing.
As described above, be only preferred embodiment of the present utility model, when can not limit the scope of the utility model enforcement with this, namely the simple equivalence change generally done according to the utility model claim and model utility description with modify, all still belong in scope that the utility model patent contains.
Claims (4)
1. for the axial force balance of multistage centrifugal pump and a device for sealing, comprise main shaft, it is characterized in that, on the middle part outer wall of described main shaft, cover has restrictor sleeve, and on described restrictor sleeve, cover has orifice sleeve; The leading portion outer wall of described main shaft is arranged with several impellers successively, the back segment outer wall of described main shaft is arranged with successively last anti-impeller and some anti-impellers, some described impellers are arranged on described restrictor sleeve the same side, and the anti-impeller in described end and some anti-impellers are at the opposite side of described restrictor sleeve; Described impeller, last anti-impeller and anti-impeller are respectively arranged with stator, last return guide vane and return guide vane, the anti-impeller in described end is provided with back blades.
2. a kind ofly as claimed in claim 1 it is characterized in that for the axial force balance of multistage centrifugal pump and the device of sealing, described last return guide vane is arranged on the termination of restrictor sleeve.
3. a kind ofly as claimed in claim 2 it is characterized in that for the axial force balance of multistage centrifugal pump and the device of sealing, the number of described back blades is 4.
4. a kind ofly as claimed in claim 3 to it is characterized in that for the axial force balance of multistage centrifugal pump and the device of sealing, between described last return guide vane and described back blades, form space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420651842.9U CN204239282U (en) | 2014-10-27 | 2014-10-27 | A kind of for the axial force balance of multistage centrifugal pump and the device of sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420651842.9U CN204239282U (en) | 2014-10-27 | 2014-10-27 | A kind of for the axial force balance of multistage centrifugal pump and the device of sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204239282U true CN204239282U (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420651842.9U Active CN204239282U (en) | 2014-10-27 | 2014-10-27 | A kind of for the axial force balance of multistage centrifugal pump and the device of sealing |
Country Status (1)
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|---|---|
| CN (1) | CN204239282U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
-
2014
- 2014-10-27 CN CN201420651842.9U patent/CN204239282U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
| CN108496010B (en) * | 2015-12-07 | 2021-04-02 | 流体处理有限责任公司 | Opposed impeller wear ring undercut for counteracting axial thrust generated in a multistage pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Guo Juan Document name: Notification of Passing Examination on Formalities |